# Using Active Directory Connector

Microsoft (R) Active Directory Connector (ADC) replicates a hierarchy of directory objects between the Microsoft Exchange Server version 5.5 directory and the Microsoft Windows NT(R) version 5.0 Active Directory.

- For help with specific tasks, see How To...
- For general background information, see Concepts.
- For problem-solving instructions and preventive maintenance information, see Maintenance and Troubleshooting.